Growing community of inventors

Lyman, SC, United States of America

John A Crispin

Average Co-Inventor Count = 3.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 1

John A CrispinRobert N Scharpf (1 patent)John A CrispinJames Thomas Dewberry (1 patent)John A CrispinJohn A Crispin (1 patent)Robert N ScharpfRobert N Scharpf (10 patents)James Thomas DewberryJames Thomas Dewberry (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Wabtec Holding Corporation (1 from 192 patents)


1 patent:

1. 7543796 - High flow calibration test point

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12/13/2025
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